Does it exist? Temperature sender/switch combo.

The Unknown

Well-known member
Joined
Aug 1, 2020
Member Number
2391
Messages
104
Loc
PNW
Does anyone know if something like this exists? After a few hours of searching and coming up with nothing, I suspect not but here goes anyways.

I am looking for a temperature sending unit that will send a signal at a preset temperature to activate a fan relay that I can also monitor with a gauge

I can find either or, but not a multi/combo unit. I am trying to avoid using two seperate sensors to monitor and control my transmission temps.

As I type this I am wondering if there is maybe a gauge that can send a signal at a desired temperature rather than relying on the temp sender to serve both purposes. Back to searching......

Any leads would be much appreciated.
 
Are you running an ecu? Anything with I/O should be able to output the desired signal.
 
I’m assuming 12v dc. I have no real answer but are you looking for a sensor that will turn on an electric rad fan that you can also hook a gauge to?

The temp measuring is an analog function and sent to a device that uses the logic to turn fan off and on. I rigged up something similar using an arduino several years ago, but I haven’t played with that stuff since then.
 
Easier to do 2 sensors or get a system that processes the signal and triggers the fan on its own (aka programmable ECU)
 
This can piggy back a OEM gauge sensor or use just about any sensor you'd want to use.

www.ebay.com

VARIABLE PWM FAN CONTROL works with ANY sensor, compare to Lingenfelter VSFM-002 | eBay

It also has special selections for driving Solid State Relays (SSR's) to vary DC fans with no fuss. Easy 2-button programming makes setting the temperature span a snap, just run the engine and press one button at your "turn on" setpoint, another button at your "full speed" setpoint.
www.ebay.com
 
Oddball said:
Are you running an ecu? Anything with I/O should be able to output the desired signal.
Click to expand...
Yes, I am going to be running the Terminator X. I was going to use it but I believe I will still need an additional sensor if I want to monitor the temp with a gauge rather than the 3.5 screen. A single sensor that does both just seemed like the easy set and forget solution.
cervelorod said:
I’m assuming 12v dc. I have no real answer but are you looking for a sensor that will turn on an electric rad fan that you can also hook a gauge to?
Click to expand...
Pretty much.
Bebop said:
Easier to do 2 sensors or get a system that processes the signal and triggers the fan on its own (aka programmable ECU)
Click to expand...
Agreed. 2 sensors was my original plan but figured I'd see if there was a single sensor option that I was unaware of. I'd like to use the ECU but monitoring the temp with a gauge seems to require an additional sensor regardless.

Now that I think of it, I did see a post of yours a while back talking about rewiring a 3 wire temp sensor to feed a temp input to the Holley. I'll look into that option and see if I will do what I am looking for.
CarterKraft said:
On/off fan or PWM?

Several of us are using the Widget Man FPM module to drive a pwm fan with just about any gauge sensor you want.
Click to expand...
It is a brushed fan. I was going to use the Widgetman controller but decided on just running it on'off to simplify and free up some space for other wiring and such.
CarterKraft said:
You can convert on/off fan to pwm control with a SSR, widget man includes instructions on how to do that.
Click to expand...
Yeah, his controller looks pretty neat and super simple. I actually posted another thread referencing his wiring diagram. I am trying to do the same thing (PWM an SSR) with my Holley system for my radiator fan. I am a ****** when it comes to all of this so I may end up using his controller in the end anyways lol.

I was planning to do the same for my trans fan but decided against it. The fan is a small draw, even on start up and runs very quiet on full blast. In this case I am going to sacrifice the PWM control in favor of simplicity.
Bebop said:
www.autometer.com

2-1/16" TRANSMISSION TEMPERATURE, 100-300 °F, STEPPER MOTOR, SPEK-PRO, BLACK DIAL, BLACK BEZEL, FLAT ANTIGLARE LENS

P342328 Gauge, TransT, 2 1/16", 300 °F, Stepper Motor w/Peak & Warn, Blk/Blk, Spek-Pro
www.autometer.com www.autometer.com

This will let you trigger a relay from the gauge directly.
Click to expand...
This looks to be exactly what I am looking for. Might be the easiest route too. Thank you!
 
Use a canbus for your gauges and trigger the fan with the ecu. Dakota digital gauges have it figured out. Use a bim module, Bim 01-2 hlly.
 
The Unknown said:
Yes, I am going to be running the Terminator X.
Click to expand...
Then there is no reason for any of this ****.

Use an input to monitor trans temp,
an output to trigger the fan
and if you're hell bent about using a gauge to monitor the temps (stupid) you can use another output to drive a ground signal mimicking a regular Autometer gauge sender.

If you're low on I/Os, you can get the expander box for cheap and it even comes with a thermistor input which means no ****ing around with a pullup resistor, like I posted a while back.
 
You must log in or register to reply here.
Top Back Refresh